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Method and device for detecting stress strength of concrete by bending method

A technology of compressive strength and flexural strength, applied in the direction of applying stable tension/pressure to test the strength of materials, etc., can solve the problems of inaccurate test results, complex stress conditions, damage to the tested components, etc., and achieve a simple and easy test process. Line, low cost, wide range of effects

Inactive Publication Date: 2013-05-29
王文明
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Problems solved by technology

[0005] The purpose of the present invention is to provide a method and device for detecting the compressive strength of concrete by the anti-bending method. It is necessary to solve the problem that most of the existing methods for testing the compressive strength of concrete have certain damage to the components to be tested, and there are many restrictions during the test. The medium stress situation is complicated, which often leads to technical problems of inaccurate test results

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  • Method and device for detecting stress strength of concrete by bending method
  • Method and device for detecting stress strength of concrete by bending method
  • Method and device for detecting stress strength of concrete by bending method

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Embodiment Construction

[0030] A method for detecting the compressive strength of concrete by anti-bending method, the steps are as follows:

[0031] Step 1: Randomly drill three flexural test pieces 6 on the concrete structure or member to be tested; when drilling the flexural test pieces, hollow water drills are used, and the inner diameter of the hollow water drills is not less than 44 mm;

[0032] Step 2, put the first anti-bending test piece into the test piece conduit 11 of the anti-bending device, connect the central area of ​​the anti-bending test piece 6 with the tension rod 7 through the connecting plate 10 with a socket, and place it in the socket Insert the anti-bending piece 14, start the hand-operated oil pump 9 to apply upward pulling force to the central area of ​​the anti-bending test piece through the tension rod 7;

[0033] Step 3, gradually increase the tensile force until the flexural test piece 6 is broken by the supporting section 6.1 and the broken section 6.2, see figure 2 ...

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Abstract

The invention relates to a method and a device for detecting the compressive strength of concrete by a bending method. The method comprises the following steps of: recording rupture load during damage of the concrete and an area of a damaged section to calculate bending strength; and establishing a correlativity between the bending strength and the corresponding strength of a cubic test piece with the side length of 150mm to deduce the compressive strength of the concrete. By applying fracture resistance force to a test piece, influencing factors in the testing process are reduced and the testing accuracy is improved; moreover, the testing process is simple and feasible. The invention can be widely applied to detection of strength of concrete structure entities in the building industry, railway industry, traffic industry, water transportation industry, harborwork industry and the like.

Description

technical field [0001] The invention relates to a method and device for detecting concrete strength, in particular to a method and device for detecting compressive strength of concrete. Background technique [0002] At present, the methods for testing the compressive strength of concrete include rebound method, core drilling method, ultrasonic rebound comprehensive method, post-anchor method and shear compression method. The following table compares the principles and existing defects of the above test methods. [0003] [0004] To sum up, the present invention is similar to the current method for testing the compressive strength of concrete, which uses the relevant characteristics of concrete to estimate its compressive strength. But the difference is that most of the current methods for testing the compressive strength of concrete are only the strength of the tested concrete surface. Although some methods do not damage the concrete structural members, the test accurac...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N3/10
Inventor 王文明邱平罗民脱江英邓军
Owner 王文明
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